An atmosphere of moral panic surrounds religion. Viewed not so long ago as a relic of superstition whose role in society was steadily declining, it is now demonised as the cause of many of the world's worst evils. As a result, there has been a sudden explosion in the literature of proselytising atheism. A few years ago, it was difficult to persuade commercial publishers even to think of bringing out books on religion.

Today, tracts against religion can be enormous money-spinners, with Richard Dawkins's The God Delusion and Christopher Hitchens's God Is Not Great selling in the hundreds of thousands. For the first time in generations, scientists and philosophers, high-profile novelists and journalists are debating whether religion has a future. The intellectual traffic is not all one-way. There have been counterblasts for believers, such as The Dawkins Delusion? by the British theologian Alister McGrath and The Secular Age by the Canadian Catholic philosopher Charles Taylor. On the whole, however, the anti-God squad has dominated the sales charts, and it is worth asking why.

The abrupt shift in the perception of religion is only partly explained by terrorism. The 9/11 hijackers saw themselves as martyrs in a religious tradition, and western opinion has accepted their self-image. And there are some who view the rise of Islamic fundamentalism as a danger comparable with the worst that were faced by liberal societies in the 20th century.

For Dawkins and Hitchens, Daniel Dennett and Martin Amis, Michel Onfray, Philip Pullman and others, religion in general is a poison that has fuelled violence and oppression throughout history, right up to the present day. The urgency with which they produce their anti-religious polemics suggests that a change has occurred as significant as the rise of terrorism: the tide of secularisation has turned. These writers come from a generation schooled to think of religion as a throwback to an earlier stage of human development, which is bound to dwindle away as knowledge continues to increase. In the 19th century, when the scientific and industrial revolutions were changing society very quickly, this may not have been an unreasonable assumption. Dawkins, Hitchens and the rest may still believe that, over the long run, the advance of science will drive religion to the margins of human life, but this is now an article of faith rather than a theory based on evidence ...

To read the rest of John Gray's essay in Review on the new atheism, go here.